John heino



Patented J 11110 15, 1920.

mun/mi? JOHN Hf/NO A TTORNEY-S' WgESSES PATENT OFFICE.

Joint Hume, on :u'nw YORK, 1v. Y.

PHONQGEAPH-NEEDLE.

sp ifi i n -m m Patented June 1 5;, 1920.

' Application man a-1o, 1019. Serial No. answer.

To all whom it may concern:

Be it-lmown that LJonN Hume, a c1t1- zen of Finland, and a resident of the city of New York, borough of Bronx, in the county of Bronx and State of New York, have invented a new and Improved Phonograph-Needle, of which the following is a full clear, and exact description.

T is invention ertains to a phonograph needle which it &all not be necessa to renew after each record has been play as is now customary.

It is well known that needles have been put on the market, known as tungsten needles, which consist merely of a body of suitable metal to which is welded, or otherwise secured, a point of extremely hard metal, with which: approximately from ten to twenty-five records can be played without renewing the needle. However, due to the great hardness of the actual playmgpomt of this needle, it wears the records excessively and results in such records becoming very scratchy after being used a comparatively short time only.

My invention contemplates the provision of a phonograph needle which may be ut1- lized an number of times, but in which the actual p aying point is not of sufiicient hardness to damage the record.

A further object of this invention is to provide a needle of this style in which the playing point may be renewed without the exercise of any mechanical skill whatso- Figure 1 is a sectional side elevation of,

m improved needle,

ig. 2 is a plane side elevation; and

Fig. 3 is a sectional view taken along the lines A-A of Fig. 1.

In these figures,1 designates the needle,

or point, holder, which comprises a body provided with a longitudinal bore, as indicated at 2 and a slot extending throughout its entire length from the outer face of the body 1 through to the bore 2, as indicated at 3. A. filler 4 is mounted within the bore 2, such filler including a material which may be of any suitable hardness, for engaging the grooves on a record and transmitting the vibrations on the face of such record to the diaphragm of the receiver.

As is obvious, the filler 4 is slidable within the bore 2, and to retain this filler in its suitable position, I rovide clamping means for engaging the fi er. and. by constricting the bore render such filler movable. This clamping means, briefly-stated, comprises a nut 5 mounted upon screw threaded formed upon a; tapering end portion 7 of the body 1; Theslot 3 is provided with branch slots 8 near its up er end, and termina in such branch ots and extending there rom downwardly to a point adjacent the tapered end portion of the body 1, is a T-sha ed rib 9, the lower part of whose body is we go shape and has its outer face provided with screw threads, as indicated at 10.

In operation it will now be seen that granting that the point of the filler 4 has become worn, and it is desired to feed a certain amount of the same downwardly through the bore 2, so that subse uent rec ords to be played can be. 18] )I'0( uced, all that it will be necessary for the operator to do is to turn the nut 5 in a clockwise direction, whereupon the rib 9 will become slightly unseat-ed and the bore 2 adjacent the nut 5 will enlarge sufliciently for the filler 4 to be slid downwardly to a suflicient extent it being noted, however, that longitudin shifting of the rib 9 is prevented by means of thecross-arms of the T-sha ed rib 9 which fit into the slots 8. Upon t is operation being completed, all that it is necessary for the operator to do is to reverse this procedure, by sim Iy turni the not 5 in an anti-clockwise direction, w are upon the bore 2. adjacent the nut will be constricted and the rod 9, by virtue of its wedge shape and screw threads 10, will be forced inwardly and firmly en the filler 4 and press the same against 1: e opposite face of the bore 2 and prevent any movement of such filler with respect to the bod 1.

I-liwing thus described my inventipn, I

as new end desire to secure by Letwant:

honograph needle, mcludmg a bod rdvi ed wlth a longitudinal bore exten mg through its entu'e len 11, a slot extendin from the bore to t e exterior surface 0 the body, such slot being provided with a gain of branch arms, a T-sha ed I ib mounte Within such slot and its ranch arms, a filler within such bore, and means 10 for c0nstric'ting the bore and pressing the rib firmly therembo to retein the filler in 

